ECMAScript 6 features available in Node.js 0.12

A new stable release of Node.js (0.12) has landed recently with an upgraded Google's v8 JavaScript engine, v3.28.73.

What ECMAScript 6 features are currently present in Node.js, without using the

--harmony

flag?

I have checked several sites claiming to list the ES 6 features but all of them seem out of date - most prominently, this table (Update:now updated with current Node.js status as of 0.12), because several of the features are listed as requiring the

--harmony

flag while I found some of them being enabled by default (Maps, Sets, Symbols, to name a few). Update: Node specific tables have since been made available

Also, trying to google this information purely for the v8 engine gives too up-to-date information - current v8 release is 4.2.*, which is quite ahead of what Node.js uses.

My hopes are that this question (and its answers) will become a comprehensive summary on what ES 6 features are now available to Node.js developers.